A teen researcher may have come across a way to keep some bacteria from turning deadly

By Sid Perkins, 17:59 PM May 21, 2014

LOS ANGELES — In novels and short stories, there are many examples of characters with split personalities. Under the light of a full moon, people who have been cursed or bitten by werewolves change into the vicious creatures themselves. When the friendly Dr. Jekyll drinks a certain potion, he transforms into the murderous Mr. Hyde. But an Oregon teen has found a way to keep such a scary alter ego from emerging — at least among some potentially deadly bacteria.